Today, the automobile industry is driven by the urge to reduce emissions and to
achieve the low CO2 emission targets that are set by the European Legislation
to reduce the average CO2 emissions of a manufacturer's
eet below 95 g/km
by 2021. This has led to the focus on Mild Hybrid technology. This involves
the introduction of a higher system voltage i.e. 48 V. However, the initial
generation of Mild Hybrid Electric Vehicles is expected to have both 48 V and
12 V systems. The purpose of this study is to evaluate the potential benets of
shifting electrical loads to the 48 V supply in the future Mild Hybrid Electric
Vehicles at Volvo Car Corporation (VC).
A literature study has been carried out to identify the loads on the existing 12 V
automotive electrical network that could be considered to be suitable for a 48 V
operation. The whole system has been modelled in MatLab R
Simulink R
and
simulations were carried out to evaluate their performance at three temperatures
(􀀀20C, +20C and +40C). The savings in fuel consumption due to moving of
loads to the 48 V bus have been analysed. Also, new loads that could improve the
user experience have been identied. The complete system has been evaluated
for its electrical performance and fuel consumption. The weight reduction by
shifting loads to the 48 V bus have also been looked into.
The results suggest that the 48 V mild hybrid system eciency is high during
high loading condition primarily due to the increased eciency of Belt Driven
Starter Generator (BSG). The fuel savings at 􀀀20C, +20C and +40C have
been estimated to be 376 ml/100 km, 32 ml/100 km and 103 ml/100 km respectively
for the WLTP cycle. The considerable benet on reduced fuel consumption
is also due to the higher amount of energy that is recuperated at 48 V.
Due to these abilities of the BSG, it is still advantageous to supply the present
day 12 V electrical network from a 48 V BSG through a DC/DC converter.
The PTC heaters, defrosters, blowers, EPS, cooling fan and fuel pump could be
supplied from a 48 V network in the initial generation of MHEVs.

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BibTeX @misc{Brusokas2015,author={Brusokas, Linas and Rajarathinam, Naveen Raja},title={Evaluation of Electrical Loads on 48 V Supply in Future Mild Hybrid Electric Vehicles},abstract={Today, the automobile industry is driven by the urge to reduce emissions and to
achieve the low CO2 emission targets that are set by the European Legislation
to reduce the average CO2 emissions of a manufacturer's
eet below 95 g/km
by 2021. This has led to the focus on Mild Hybrid technology. This involves
the introduction of a higher system voltage i.e. 48 V. However, the initial
generation of Mild Hybrid Electric Vehicles is expected to have both 48 V and
12 V systems. The purpose of this study is to evaluate the potential benets of
shifting electrical loads to the 48 V supply in the future Mild Hybrid Electric
Vehicles at Volvo Car Corporation (VC).
A literature study has been carried out to identify the loads on the existing 12 V
automotive electrical network that could be considered to be suitable for a 48 V
operation. The whole system has been modelled in MatLab R
Simulink R
and
simulations were carried out to evaluate their performance at three temperatures
(􀀀20C, +20C and +40C). The savings in fuel consumption due to moving of
loads to the 48 V bus have been analysed. Also, new loads that could improve the
user experience have been identied. The complete system has been evaluated
for its electrical performance and fuel consumption. The weight reduction by
shifting loads to the 48 V bus have also been looked into.
The results suggest that the 48 V mild hybrid system eciency is high during
high loading condition primarily due to the increased eciency of Belt Driven
Starter Generator (BSG). The fuel savings at 􀀀20C, +20C and +40C have
been estimated to be 376 ml/100 km, 32 ml/100 km and 103 ml/100 km respectively
for the WLTP cycle. The considerable benet on reduced fuel consumption
is also due to the higher amount of energy that is recuperated at 48 V.
Due to these abilities of the BSG, it is still advantageous to supply the present
day 12 V electrical network from a 48 V BSG through a DC/DC converter.
The PTC heaters, defrosters, blowers, EPS, cooling fan and fuel pump could be
supplied from a 48 V network in the initial generation of MHEVs.},publisher={Institutionen för energi och miljö, Elteknik, Chalmers tekniska högskola,publisher={Institutionen för energi och miljö, Elteknik, Chalmers tekniska högskola,},place={Göteborg},year={2015},keywords={48 V system, Mild Hybrid Electric Vehicle, BSG, WLTP},note={119},}

RefWorks RT GenericSR PrintID 221240A1 Brusokas, LinasA1 Rajarathinam, Naveen RajaT1 Evaluation of Electrical Loads on 48 V Supply in Future Mild Hybrid Electric VehiclesYR 2015AB Today, the automobile industry is driven by the urge to reduce emissions and to
achieve the low CO2 emission targets that are set by the European Legislation
to reduce the average CO2 emissions of a manufacturer's
eet below 95 g/km
by 2021. This has led to the focus on Mild Hybrid technology. This involves
the introduction of a higher system voltage i.e. 48 V. However, the initial
generation of Mild Hybrid Electric Vehicles is expected to have both 48 V and
12 V systems. The purpose of this study is to evaluate the potential benets of
shifting electrical loads to the 48 V supply in the future Mild Hybrid Electric
Vehicles at Volvo Car Corporation (VC).
A literature study has been carried out to identify the loads on the existing 12 V
automotive electrical network that could be considered to be suitable for a 48 V
operation. The whole system has been modelled in MatLab R
Simulink R
and
simulations were carried out to evaluate their performance at three temperatures
(􀀀20C, +20C and +40C). The savings in fuel consumption due to moving of
loads to the 48 V bus have been analysed. Also, new loads that could improve the
user experience have been identied. The complete system has been evaluated
for its electrical performance and fuel consumption. The weight reduction by
shifting loads to the 48 V bus have also been looked into.
The results suggest that the 48 V mild hybrid system eciency is high during
high loading condition primarily due to the increased eciency of Belt Driven
Starter Generator (BSG). The fuel savings at 􀀀20C, +20C and +40C have
been estimated to be 376 ml/100 km, 32 ml/100 km and 103 ml/100 km respectively
for the WLTP cycle. The considerable benet on reduced fuel consumption
is also due to the higher amount of energy that is recuperated at 48 V.
Due to these abilities of the BSG, it is still advantageous to supply the present
day 12 V electrical network from a 48 V BSG through a DC/DC converter.
The PTC heaters, defrosters, blowers, EPS, cooling fan and fuel pump could be
supplied from a 48 V network in the initial generation of MHEVs.PB Institutionen för energi och miljö, Elteknik, Chalmers tekniska högskola,PB Institutionen för energi och miljö, Elteknik, Chalmers tekniska högskola,LA engOL 30